The correct answer is d) All of the above.
Traditional farming practices in Sikkim often incorporate organic methods, mixed cropping systems, and agroforestry.
Organic farming is a method of crop and livestock production that involves much more than choosing not to use pesticides, fertilizers, genetically modified organisms, antibiotics and growth hormones. Organic production is a holistic system designed to optimize the productivity and fitness of diverse communities within the agro-ecosystem, including soil organisms, plants, livestock and people. The principal goal of organic production is to develop enterprises that are sustainable and harmonious with the environment.
Mixed cropping is a farming system in which two or more crops are grown together on the same field. This system has been practiced for centuries in many parts of the world, and it has a number of advantages over monoculture (the cultivation of a single crop). Mixed cropping can help to improve soil fertility, reduce pest and disease problems, and increase crop yields.
Agroforestry is a land-use system that integrates trees and shrubs with crops and/or livestock. Agroforestry systems can be designed to meet a variety of objectives, such as increasing crop yields, improving soil fertility, providing fodder for livestock, and conserving water.
All of these practices are beneficial to the environment and can help to improve the sustainability of agriculture.